Locking device for railway switches



J. A. DAOUST.

LOCKING DEVICE FOR RAILWAY SWITCHES.

APPLICATION FILED OCT. 20, I921,

Patented Apr. 18, 1922.

m f mm W m m %N a fi, M M M NM 7 Q J ww MN t f JOSEPH ARTHUR DAOUS'I', OF MONTREAL, QUEBEC, CANADA.

LOCKING DEVICE FOR RAILWAY SWITCHES.

Specification of Letters latentp Patented Apr. 18, 1922- Application filed October 20, 1921; Serial No. 509,146.

To all whom, it mag/concern:

Be it known that I, JOSEPH ARTHUR.

DAOUST, a subject of the King of Great Britain, residing at Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Locking Devices for Railway Switches; andI do hereby declare that the following'is a full, clear, and exa'ctdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

thorized opening orc The present invention relates to new and useful improvements in looking devices for railway switches, v

The primary object of the invention is the provision of a locking device for railway switches so constructed as to prevent unauosin g of the switch without necessitating the use of the usual key actuated locks, I p v Another object of the invention is the provision of a'locking device in which the handle portion thereof is heldin position by a concealed locking apparatus which can only be actuated by the use son or person instructedin the use of the ame. v e

A further objectof theinvention is the provision of a lockingdevicefor railway switches such as above referred to and whichwill be comparatively simple and-inexpen- 'sive to manufacture, reliable and efficient in use, and readily operated.

Another object of the invention is the provision of an additional lockingmeans to prevent movement of the bell crank lever.

5 With the above and other objects in. view, the present invention residesin the novel features of construction, formations, combinations and arrangements of parts to he hereinafter more fully described, claimed, and illustrated in the accompanying 'drawing, forming a "part of the present application, and in which: f v Figure 1 is 'a side elevationof a'switch including the operating arm having the-invention applied thereto;' e Figure 2 is a longitudinal. sectional view takenthrough the arm showing the latterin its lowermost position; or I 1 of an authorized pervFigure 3 is a similar view showing the arm raised; j

Figure 4; is a sectional view taken through I the arm in the position shown inFigure 2,

on a plane'at right angles to the plane oi the arm; 7

Figure 51s a s milar View taken through the'arm 1n the position shown in Figure 8;-

Fi ure 6 is a view showing the lockingpin 7 in eiigagement with the slidable operating rod; and, l

Figure 7 is a similar view showing the sliding operating rod released.

Referring now to'the accompanying drawing by correspondingcharacters of reference throughout the several views, the numeral 6 designates operating member of a switch which is mounted in the standard 7 whichis provided at one side thereof with a laterally extending in general the rotating bifurcated arm 8 within which the usual switch lever '9 may be inserted The central portion of the lever '9 is enlarged at 10 and provided with a recess 11 in which a bell cranklever 12 is pivotally mounted as at 13. The free end of thebell crank lever is provided with a finger piece 1 1, while the opposite" end 'therc'ofis pivotally connected at 15 t0 the curved lower end of a slidably operating rod 18 held normally in one position by a spring 19. member is shown at 20 within an enlarged recess 22 provided in the upper'end oftliei lever 9; The lower end' of the-lever 20 is provided with an-oiiset extension 23 which is pivotally connected at 2 1 to the upper end of the rod 18, while the upper terminal of the latch 20. carries a looking pin 25 which projects through an opening 26 formed in the 'side of a lever 9 into a recess 27 providedin one side of the arm 8. Obviously when the locking pin 25 is in engagement with the recess '27, as shown in Figures 2 and the switch lever 9 will be locked against any undesiredv or unauthorized movement, a

As an additional means for locking the slidable operating rod to preventany unauthorized'use of the switch, this rod 18 'is provided with an opening SOprovidedin one side thereotfor engagementwith a sliding A latch and is pivoted at 21 I pin 31. This pin 31 is provided at its upper same.

edge with rack teeth 32 for engagement with the pinion 83 which is disposed in mesh therewith and which is carried by a shaft 84. An arm 35 extends from the pinion and is connected to a push rod 36 provided at its lower end with a push button 37' which is normally held in locking position by a spring 38. An authorized person may be instructed to operate the device as follows: a

The operator firstpresses inwardly on the push button 87 which-forcesthepushrod 36 upwardly rotating the pinion 33in such direction as to move the pin 31 outwardly out of engagement with the notch 30. The handle is then grasped in one handof the operator who next inserts the fingers of the opposite hand into therecess 10, pressing against the finger piece 14 which draws-the rod 18, downwardly against the tension of the spring 19 and moves the locking pin 25 from the position shown inFigure- 1 out of engagement with the recess 27, as shown in Figure 5. This permits the lever 9 to be raised out of engagement with the bifurcated end of the arm 8 and to be turned'in the desired manner to operate the switch. ,A

plate 29 is pivoted as at 39 within the recess 22 and is designed to swing by gravity in' front of the opening 27 when the lever 9 is movedto raised position to prevent the entrance ofithe pin 25 within the opening 27.

This prevents the pin 25 from extending beyond the side of the lever and interfering with the lowering of the lever from the position shown in Figure 3 to that shown in Figure 2, but. when the lever is moved to the position shown in Figure 2 from that shown in Figure 3, the plate 29 will spring by gravity'out of the path of the opening 27 permitting the pin 25 to again engage the said opening and lock the lever 9' against movement. i

From the foregoingdescription, taken in ,1. The herein described locking'device for switches including a concealed locking pin and a concealed lever for actuating the '2. Theherein described locking device for switches including an operating lever,- a

arm having a recess formedtherein, a look ing pin mounted within the lever for proectlon into the recess in the arm, and a lever for actuating said pin.

4. The herein described locking device for switches including in combination with a switch lever a locking pm mounted 1n the lever, a bell crank lever for actuating the pin, a latch supporting the pin, aspring actuated rod connecting the latch and bell crank lever, and an arm for-engagement with the lever, sald arm having a recess formed "therein for receiving the locking in. 5., The herein described locking'device for switch levers comprlsmg the comblnatlon with a lever and an arm having, one end.

bifurcated to receive the-lever, said arm having a recess formed therein, a recess formed within the lever, a bell crank lever mounted in-said. last mentioned recess, a locking pin mounted within the lever for engaging the recess in the arm, alatch'pivoted within the leveivand supporting" the pin, a spring actuatedrod connecting the bell crank lever with said latch, and a pivoted swinging plate movable .into and out of the path of the locking pin, substantially V as and for the purposes set forth.

6. The herein described locking apparatus for switches including a switch operating lever, an arm engaging thesame, said arm having a recess formed therein, a locking pin mounted withinthelever for projection into the recess in said arm, alever for actuating sald pin, and an additional lock: lng means TOISZLld lever.-

7. The herein described locking device for switches including the combinationof a switch lever, a locking pin mounted in said -lever,.a' bell crank lever for actuating the pin, a latch supporting the pin, aspring actuated rod controlling the latch and bell 1 crank lever, an arm for engagement'with said lever, said arm having a recess formed therein forreceiving the locking pin, said spring actuated rod having a recess formed therein, a second locking pin engaging the recess in said rod, and-means extending through the end of the switch lever for actuating the second mentioned locking pin, substantially as and for the purposes set forth. y

8. The herein described locking devices for switches including a' switch lever, a look ing pin mounted in said lever, a bell crank lever operatively connected to the pin, a

latch supporting the pin, aspring actuated rod connecting the latch and the bellcrank lever, an arm engaging the lever, said arm n p having a recess formed therein for receiving the locking pin, thespring actuated rod also having a recess formed therein, a second locking pin for engagement with the recess in the spring actuated rod, rack teeth formed upon the second mentioned locking pin, a pinion meshing with therack teeth ofsaid pin, an arm extending from the pinion, a.

through the switch lever, a-push button secured t0 the push rod, and a spring engaging the same, substantially as and for the purposes set forth.

In witness whereof I have hereunto set my 15 hand.

JOSEPH ARTHUR DAOUST.

ush rod secured to the arm and extending 10 

